About a month ago, Adam Wilson thought of a Tweet, and "poof", it magically appeared to his followers.

     Of course, as we grow up, most of us stop believing in magic.  We learn that there is an explanation for what fools our eyes.  Adam Wilson and his associates have been studying pieces of technology that interpret people's thoughts in an effort to glean communication from those who cannot speak, such as patients with (ALS) brain stem stroke, and upper spinal cord injury.

     Recently, moving a cursor on screen has been an effective scientific exercise for patients with lock-in syndrome.  But their concern is communication.

     Wilson believed that Twitter provided a good test interface for new apparatus he uses.  In essence, all the letters are displayed, and flashing.  Then the letter "R" stops flashing, then appears and starts flashing.  The brain recognizes that something is different about this letter, and this brain activity can be scanned.

I am not going to do it justice attempting to explain it more.  One can find more about this interesting article here.